Cast Cliffside Lookout by paying {W/P}.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
Whenever Cliffside Lookout enters the battlefield, it and Ondu Cleric trigger.
Resolve the Cliffside Lookout trigger, putting a +1/+1 counter on it.
Resolve the Ondu Cleric trigger, causing you to gain at least two life.
Activate Phyrexian Altar by sacrificing the Soldier token, adding {W}.
Activate Sword of the Realms by paying {1}{W}, attaching it to Cliffside Lookout.
Activate Phyrexian Altar by sacrificing Cliffside Lookout, adding {1}.
When Cliffside Lookout dies, Sword of the Realms triggers, returning Cliffside Lookout from your graveyard to your hand.
Repeat.

Infinite death triggers

Infinite ETB

Infinite lifegain triggers

Infinite LTB

Infinite sacrifice triggers

Infinite storm count

Halvar, God of Battle // Sword of the Realms

Defiler of Faith

Phyrexian Altar

Ondu Cleric

Cliffside Lookout

Cast Cliffside Lookout by paying {W/P}.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
Whenever Cliffside Lookout enters the battlefield, it and Ondu Cleric triggers, causing you to gain at least two life.
Activate Phyrexian Altar twice by sacrificing Cliffside Lookout and the Soldier token, adding {1}{W}.
Whenever Cliffside Lookout dies, Sigil of the New Dawn triggers, causing you to pay {1}{W} to return Cliffside Lookout from your graveyard to your hand.
Repeat.

Sigil of the New Dawn

Combos with "Cliffside Lookout"